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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*/
#include "common/algorithm.h"
#include "common/util.h"
#include "graphics/primitives.h"
#include "graphics/surface.h"
namespace Graphics {
template<typename T>
static void plotPoint(int x, int y, int color, void *data) {
Surface *s = (Surface *)data;
if (x >= 0 && x < s->w && y >= 0 && y < s->h) {
T *ptr = (T *)s->getBasePtr(x, y);
*ptr = (T)color;
}
}
void Surface::drawLine(int x0, int y0, int x1, int y1, uint32 color) {
if (bytesPerPixel == 1)
Graphics::drawLine(x0, y0, x1, y1, color, plotPoint<byte>, this);
else if (bytesPerPixel == 2)
Graphics::drawLine(x0, y0, x1, y1, color, plotPoint<uint16>, this);
else
error("Surface::drawLine: bytesPerPixel must be 1 or 2");
}
void Surface::create(uint16 width, uint16 height, uint8 bytesPP) {
free();
w = width;
h = height;
bytesPerPixel = bytesPP;
pitch = w * bytesPP;
pixels = calloc(width * height, bytesPP);
assert(pixels);
}
void Surface::free() {
::free(pixels);
pixels = 0;
w = h = pitch = 0;
bytesPerPixel = 0;
}
void Surface::copyFrom(const Surface &surf) {
create(surf.w, surf.h, surf.bytesPerPixel);
memcpy(pixels, surf.pixels, h * pitch);
}
void Surface::hLine(int x, int y, int x2, uint32 color) {
// Clipping
if (y < 0 || y >= h)
return;
if (x2 < x)
SWAP(x2, x);
if (x < 0)
x = 0;
if (x2 >= w)
x2 = w - 1;
if (x2 < x)
return;
if (bytesPerPixel == 1) {
byte *ptr = (byte *)getBasePtr(x, y);
memset(ptr, (byte)color, x2-x+1);
} else if (bytesPerPixel == 2) {
uint16 *ptr = (uint16 *)getBasePtr(x, y);
Common::set_to(ptr, ptr + (x2-x+1), (uint16)color);
} else {
error("Surface::hLine: bytesPerPixel must be 1 or 2");
}
}
void Surface::vLine(int x, int y, int y2, uint32 color) {
// Clipping
if (x < 0 || x >= w)
return;
if (y2 < y)
SWAP(y2, y);
if (y < 0)
y = 0;
if (y2 >= h)
y2 = h - 1;
if (bytesPerPixel == 1) {
byte *ptr = (byte *)getBasePtr(x, y);
while (y++ <= y2) {
*ptr = (byte)color;
ptr += pitch;
}
} else if (bytesPerPixel == 2) {
uint16 *ptr = (uint16 *)getBasePtr(x, y);
while (y++ <= y2) {
*ptr = (uint16)color;
ptr += pitch/2;
}
} else {
error("Surface::vLine: bytesPerPixel must be 1 or 2");
}
}
void Surface::fillRect(Common::Rect r, uint32 color) {
r.clip(w, h);
if (!r.isValidRect())
return;
int width = r.width();
int height = r.height();
// int i;
if (bytesPerPixel == 1) {
byte *ptr = (byte *)getBasePtr(r.left, r.top);
while (height--) {
memset(ptr, (byte)color, width);
ptr += pitch;
}
} else if (bytesPerPixel == 2) {
uint16 *ptr = (uint16 *)getBasePtr(r.left, r.top);
while (height--) {
Common::set_to(ptr, ptr + width, (uint16)color);
ptr += pitch/2;
}
} else {
error("Surface::fillRect: bytesPerPixel must be 1 or 2");
}
}
void Surface::frameRect(const Common::Rect &r, uint32 color) {
hLine(r.left, r.top, r.right-1, color);
hLine(r.left, r.bottom-1, r.right-1, color);
vLine(r.left, r.top, r.bottom-1, color);
vLine(r.right-1, r.top, r.bottom-1, color);
}
// FIXME: LordHoto asks why is this in Surface, since this
// just supports 8bpp surfaces. Looks like someone wants
// to subclass Surface to add this or it should be extended
// to support 16bpp (or marked as just working for 8bpp
// surfaces).
void Surface::move(int dx, int dy, int height) {
// This function currently just works with 8bpp surfaces
assert(bytesPerPixel == 1);
// Short circuit check - do we have to do anything anyway?
if ((dx == 0 && dy == 0) || height <= 0)
return;
byte *src, *dst;
int x, y;
// vertical movement
if (dy > 0) {
// move down - copy from bottom to top
dst = (byte *)pixels + (height - 1) * w;
src = dst - dy * w;
for (y = dy; y < height; y++) {
memcpy(dst, src, w);
src -= w;
dst -= w;
}
} else if (dy < 0) {
// move up - copy from top to bottom
dst = (byte *)pixels;
src = dst - dy * w;
for (y = -dy; y < height; y++) {
memcpy(dst, src, w);
src += w;
dst += w;
}
}
// horizontal movement
if (dx > 0) {
// move right - copy from right to left
dst = (byte *)pixels + (w - 1);
src = dst - dx;
for (y = 0; y < height; y++) {
for (x = dx; x < w; x++) {
*dst-- = *src--;
}
src += w + (w - dx);
dst += w + (w - dx);
}
} else if (dx < 0) {
// move left - copy from left to right
dst = (byte *)pixels;
src = dst - dx;
for (y = 0; y < height; y++) {
for (x = -dx; x < w; x++) {
*dst++ = *src++;
}
src += w - (w + dx);
dst += w - (w + dx);
}
}
}
} // End of namespace Graphics
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